Cosmological constraints from the cosmic microwave background and Lyman α forest revisited     

Uro&#; Seljak  Patrick McDonald  Alexey Makarov 《Monthly notices of the Royal Astronomical Society》2003,342(4):L79-L84

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Correlation properties of the galaxies in the Local Supercluster     

A. V. Tikhonov  D. I. Makarov 《Astronomy Letters》2003,29(5):289-297

The apparatus of a correlation gamma function is used to analyze the spatial clustering of galaxies in the Local Supercluster. In particular, we analyzed a sample corrected for the peculiar velocities of the Local Supercluster galaxies by using our original technique for separating groups of galaxies. It turned out that the peculiar velocities did not significantly distort the gamma function even for relatively small sample sizes. The distribution of the galaxies obeys a power-law decrease in density with an index of 0.6–0.7. We found evidence for a luminosity dependence of the degree of galaxy clustering within the volume under study.  相似文献   

New Radial Velocities for Dwarf Galaxies in the Local Volume     

I. D. Karachentsev  M. E. Sharina  D. I. Makarov  Yu. A. Perepelitsyna  E. S. Safonova 《Astrophysics》2015,58(3):309-317

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Geomagnetic activity as a reflection of processes in the magnetospheric tail: 2. Plasma convection model     

G. F. Krymskii  A. A. Danilov  G. A. Makarov 《Geomagnetism and Aeronomy》2013,53(5):604-612

A model of plasma convection in the magnetospheric tail was developed. Although highly simplified, the model adequately describes the main characteristics of the process. We have calculated the physical parameters characterizing the magnetotail, as well as described the convection of fluxtubes in it and the process of electron dropout. The model explains the semiannual variation in magnetic activity.  相似文献   

Intradiurnal wind variations observed in the lower thermosphere over the South Pole     

Y. I. Portnyagin  J. M. Forbes  E. G. Merzlyakov  N. A. Makarov  S. E. Palo 《Annales Geophysicae》2000,18(5):547-554

The first meteor radar measurements of meridional winds in the lower thermosphere (about 95 ± 5 km), along four azimuth directions: 0°, 90°E, 180° and 90°W; approximately 2° from the geographic South Pole were made during two observational campaigns: January 19, 1995-January 26, 1996, and November 21, 1996-January 27, 1997. Herein we report analyses of the measurement results, obtained during the first campaign, which cover the whole one-year period, with particular emphasis on the transient nature and seasonal behavior of the main parameters of the intradiurnal wind oscillations. To analyze the data, two complementary methods are used: the well-known periodogram (FFT) technique and the S-transform technique. The most characteristic periods of the intradiurnal oscillations are found to be rather uniformly spread between about 7 h and 12 h. All of these oscillations are westward-propagating with zonal wave number s = 1 and their usual duration is confined to several periods. During the austral winter season the oscillations with periods less than 12 h are the most intensive, while during summer season the 12-h oscillations dominate. Lamb waves and internal-gravity wave propagation, non-linear interaction of the short-period tides, excitation in situ of the short period waves may be considered as possible processes which are responsible for intradiurnal wind oscillations in the lower thermosphere over South Pole.  相似文献   

Hardware complex for recording soil gas concentrations and searching for precursor anomalies before strong earthquakes in South Kamchatka     

E. O. Makarov  P. P. Firstov  V. N. Voloshin 《Seismic Instruments》2013,49(1):46-52

At the Petropavlovsk-Kamchatsky geodynamic test site the instrumental complex has operated for the registration of subsurface gas concentration since 2006. In this paper the main components of the complex and their capabilities are described. To illustrate the work of the complex the dynamics of subsurface gas concentrations in the period from February to March 2011 (before and after the earthquake off the coast of Japan, March 11, 2011, M = 9.0) in one of the registration points was analyzed. These data indicate geodynamic processes during this period in the considered area at the point of subsurface gas registration. Selected dynamics anomalies of the subsurface gas concentrations can be regarded as a short-term remote precursor of the earthquake off the coast of Japan.  相似文献   

Observational database for studies of nearby universe     

E. I. Kaisina  D. I. Makarov  I. D. Karachentsev  S. S. Kaisin 《Astrophysical Bulletin》2012,67(1):115-122

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Do polar faculae on the sun predict a sunspot cycle?     

V. I. Makarov  V. V. Makarova  K. R. Sivaraman 《Solar physics》1989,119(1):45-54

The paper reports the results of the analysis of the data on polar faculae for three solar cycles (1960–1986) at the Kislovodsk Station of the Pulkovo Observatory and on polar bright points in Ca ii K line for two solar cycles (1940–1957) at the Kodaikanal Station of the Indian Institute of Astrophysics. We have noticed that the monthly numbers of polar faculae and polar bright points in Ca ii K line and monthly sunspot areas in each hemisphere of the following solar cycle have a correlation with each other. A new cycle of polar faculae and polar bright points in the Ca ii K line begins after the polar magnetic field reversal. We find that the smaller the period between the ending of the polar field reversal and the beginning of a new sunspot cycle is, the more intense is the cycle itself. The intensity of the forthcoming solar cycle (cycle 22) and the periods of strong fluctuations in activity expected in this cycle are also discussed.  相似文献   

Global magnetic activity in 22-year solar cycles     

Valentine I. Makarov 《Solar physics》1994,150(1-2):359-374

Properties of even and odd 11-year solar cycles as part of the 22-year magnetic cycle have been studied on the basis of the data on the zonal structure of the large-scale magnetic field, of polar faculae activity cycles, duration of 11-year cycles, high-latitude prominence areas, inclinations of the coronal streamers, velocity of magnetic neutral line migration, and peculiarities of the polar magnetic field reversal. It is shown that the properties of the odd cycle depend on those of the preceding even cycle. The 22-year magnetic cycle, consisting of an even and odd cycle, is a unified dynamic process. The new data obtained show that the poloidal magnetic fieldB(p) of ‘+’ and ‘−’ polarity for the new 22-year magnetic cycle is formed simultaneously, possibly in deep layers of the Sun in the form of a certain magnetic configuration, containing alternating ‘+’ and ‘−’ polarities of the field.  相似文献   

The magnetic field of the galaxy in the neighborhood of the sun and polarization of stars     

R. R. Andreasyan  A. N. Makarov 《Astrophysics》1989,31(2):560-567

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